You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Backup_and_Restore|3845" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1623" ns="0" title="TOC" />
      <page pageid="1863" ns="0" title="LinuxMCE Admin Website" />
      <page pageid="2028" ns="0" title="Backup-and-Restore" />
      <page pageid="2092" ns="0" title="ChangeLog" />
      <page pageid="2094" ns="0" title="Version 0704" />
      <page pageid="2246" ns="0" title="Software components" />
      <page pageid="3021" ns="0" title="Java Mobile Orbiter" />
      <page pageid="3468" ns="0" title="BFG GeForce 7300 GT" />
      <page pageid="3469" ns="0" title="Nvidia GeForce 7300 GT" />
      <page pageid="5182" ns="0" title="Acer X1200" />
    </pages>
  </query>
</api>